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  1. #1
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    electrometer circuit

    Need schematic for an electrometer.
    Thx

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    electrometer schematic

    Try something like ICL7106/7 .. ICL7136/7 ..
    http://www.maxim-ic.com/quick_view2.cfm/qv_pk/1353
    http://www.selectronic.fr/includes_s...il/ICL7136.pdf
    These ICs are basically 0-200mV 3˝ Digit voltmeters, so to increase input range all you need to do is to add resistive voltage dividers ..

    Here you will find detailed description of a meter based on the ICL7107, including PCB ..
    http://electronics-diy.com/ICL7107_volt_meter.php

    Regards,
    IanP



    •   Alt11th November 2006, 01:53

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  3. #3
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    electrometer circuits

    That's not an electrometer.

    Do you need accuracy, or just high sensitivity? Try this simple ion chamber project:
    http://www.techlib.com/science/ion.html



  4. #4
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    electrometer

    But this one is ..
    http://www.vk2zay.net/article.php/9
    and if you don't have 10µA FSD meter you can try to use 0-200mV device suggested in my previous post ..

    Regards,
    IanP



    •   Alt11th November 2006, 03:18

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  5. #5
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    high voltage probe schematic

    Thx to all! But I need a more precise instrument and instructions for calibration of the same in the range 0..5kV and 0..15kV!
    Thx



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    diy electrometer

    The stuff you need is a high voltmeter, not an electrometer.

    nguyennam



  7. #7
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    electrometer touchpad schematics

    Do you really need an electrometer, or simply a high-voltage meter? What input resistance to you require?

    Please clarify "more precise". How precise?

    A high voltage meter can be as simple as buying a high-voltage probe that plugs into an ordinary DVM. Example Fluke 80K-40:
    http://us.fluke.com/usen/products/Ac...ukeProducts%29

    That probe uses a simple voltage divider made from two resistors. The schematic is in the Instruction Sheet.



  8. #8
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    simple electrometer

    I really need an electrometer which is capable of measuring electrical field. I need it to measure voltage of human body for ESD testing. The input impedance Rin=infinite.
    The precision requred is 5%.



  9. #9
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    ina116 resistance measure

    Yeah, that is really electrometer.

    However, as it is related to human safety, you should buy one, it is not expensive, rather than build by yourself. It is very dangerous for you, both by the circuit itself and the safety law.

    nguyennam



  10. #10
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    high voltage probe for electrometer

    You can use INA116 for very high input impedance amp (10E15Ω) and bootstrap it to desired voltage. Although, getting accurate measurements might be very difficult even for very experienced engineer and every aspect of design would be critical. If you don't have really a lot of time to burn, buy Kethley or some other electrometer as suggested.[/tex][/u]



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